We are running a website which is powered by Drupal. Sometime ago, it was decided that the website should be served as SSL. The settings to redirect the site from http to https was done by a guy who is not with us anymore.

but it redirects every request on https to http://mydomain.com/mysite/index.php (even the urls like (https://docs.dev.domain.com/mysite/content/book/1 which should ideally be redirected to its http counterpart).

How can I remove the https so that my dynamic URLs are served via plain http?
Sorry if this is very novice problem.